diff --git a/types/tmi.js/tsconfig.json b/types/tmi.js/tsconfig.json
index da2062714c..b8bbb67694 100644
--- a/types/tmi.js/tsconfig.json
+++ b/types/tmi.js/tsconfig.json
@@ -9,6 +9,7 @@
     "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
     "strictNullChecks": true,              /* Enable strict null checks. */
     "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */// "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
+    "strictFunctionTypes": true,
     "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
   }
 }
\ No newline at end of file